Portable hand pump



June 14, 1955 R. A. BRENHOLT PORTABLE HAND PUMP Filed Sept. 7, 1954 III-II:

INVENTOR) ATTORN E Yq United Statesv Patent PORTABLE HAND PUMP Richard A. Brenholt, Chetek, Wis., assignor to Brenwoll Mfg. Co., Inc., Chippewa Falls, Wis., a corporation of Wisconsin Application September 7, 1954, Serial No. 454,252

3 Claims. (Cl. 222-341) This invention relates to an oiling device and has special reference to an oiling device of manually actuated pump class.

One important object of the invention is to provide a novel and improved construction for devices of this character.

A second important object of the invention is to provide a novel device of this character operated by the opening and closing of the users hand.

A third important object of the invention is to provide a novel device of this character wherein the operation is performed by a knuckle joint arrangement.

With the above and other objects in view, the invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly claimed.

In the accompanying drawings, like characters of reference indicate like parts, and:

Fig. 1 is a vertical axial section of a device constructed in accordance with this invention.

Fig. 2 is an enlarged section on the line 22 of Fig. 1.

Fig. 3 is a similar section on the line 33 of Fig. 1.

Fig. 4 is a similar section on the line 4-4.

Fig. 5 is a perspective detail showing a pivot element used herein.

Fig. 6 is a perspective view showing the lower of a pair of links used herein.

Fig. 7 is a sectional view taken on line 7--7 of Fig. 1, and looking in the direction of the arrow.

In the invention as here shown there is provided a cylinder 10 normally used in substantially vertical position. In the lower end of this cylinder there is a closure 11, soldered in place from which extends downwardly a threaded neck 12 which may be connected by a coupling 13 with a flexible pipe 14 leading to a supply tank 15.

On the upper end of the cylinder there is a convexed screw cap 16, and an oiling nozzle 17 with a ball check 17a extends upwardly and outwardly from one side of the cap 16 and connects with the interior of the cylinder 10. In the cylinder 10 there is mounted a piston 8 provided with packing 18 to cause the piston 8 to fit tightly in the cylinder 10. This piston has a centrally-disposed recess 19 having an opening 20 at its bottom and covering this opening is an upwardly opening valve 21. The piston is secured on the bottom of a rod 22.

Pivoted on the upper end of the piston is a link 29 of U-shaped cross section. This link extends downwardly and outwardly from the cylinder 10. A lower link 30 is provided, 'U-shaped in cross section, which is of greater radius than the link 29 and the upper end of the link 30 embraces the lower end of the link 29 and is connected thereto by a pivot pin 31. On the threaded member 12 there is fitted a washer 32 which is held pressed against the closure 11 by a nut 33. This washer has a laterally extending arm 34, Fig. 5, provided with an upturned lip 35 at its free end. The link 30 has a slot 36 at its lower end which fits over the arm 34 and is held from detachment by the lip 35.

The rod 22. is surrounded by a coiled compression spring 37 which constantly urges the piston downwardly.

In operation the hand of the user is placed around the device with the knuckle joint at 31 in the palm while the fingers extend around the cylinder 10. Assuming the parts to be in the position shown in Fig. 1, in such case closing of the hand will force the joint at 31 toward the cylinder and this will cause the piston to rise in the cylinder. This movement of the piston will draw fluid from the tank 15 into the space below the piston. When the hand is relaxed the spring forces the piston downwardly and fluid will pass through the opening 20 into the space above the piston. A second contraction of the hand will then force this fluid outwardly through the nozzle 17. Repeated opening and closing movements of the hand will thus efiect a series of fluid jets issuing from the nozzle 17.

The rod 22 has a reduced threaded extension 22a on its outer end, which extension 22a extends into a solid pin 2211. This pin 22b is rotatably mounted in hub 29a, which is integral with link 29, this link being concave-convex in cross-section.

Within cylinder cap 16 is a rubber ring 38 and a steel washer 39, above spring 37, which provides an excellent seal.

While I have described the preferred embodiment of the invention and illustrated the same in the accompanying drawings, certain minor changes or alterations may appear to one skilled in the art to which this invention relates during the extensive manufacture of the same, and I, therefore, reserve the right to make such changes or alterations as shall fairly fall within the scope of the appended claims.

What is claimed, is:

1. In an oil ejecting device, a vertical cylinder, a piston reciprocable therein, a rod extending from said piston through the top of said cylinder, an upwardly opening valve carried by said piston, a spring interposed between said piston and the top of said cylinder, said rod projecting through said top and a knuckle joint, means connecting the projecting end of said rod and the lower end of the cylinder, an oil ejecting nozzle extending from the top of said cylinder, said knuckle joint comprising a link having its upper end pivoted to the top of said rod and being inclined downwardly and outwardly from the cylinder, said knuckle joint further comprising a second link having its upper end pivoted to the lower end of the first link and inclined downwardly and inwardly toward the lower end of the cylinder, and a pivotal connection between the lower end of said cylinder and the second link, said piston, links and pivotal connections lying in the same plane and said second link extending outwardly at an acute angle to said cylinder whereby compression of said second link toward said cylinder will actuate said piston.

2. In an oil ejecting device, a vertical cylinder, a piston reciprocable therein, a rod extending from said piston through the top of said cylinder, an upwardly opening valve carried by said piston, a spring interposed between said piston and the top of said cylinder, said rod projecting through said top and a knuckle joint means connecting the projecting end of said rod and the lower end of the cylinder, an oil ejecting nozzle extending from the top of said cylinder, said knuckle joint comprising a link having its upper end pivoted to the top of said rod and being inclined downwardly and outwardly from the cylinder, said knuckle joint further comprising a second link having its upper end pivoted to the lower end of the first link and inclined downwardly and inwardly toward the lower end of the cylinder, and a pivotal connection between the lower end of the said cylinder and the second link, said pivotal connection consisting of a washer secured to the lower end of the cylinder and provided with a radial pivot finger and the second link having an opening detachably engaging on said finger.

3. In a device of the class described, the combination of a cylinder, means slidably mounting a rod in said cylinder, said rod provided on its outer end with a reduced threaded extension, an outer concave-convex link pro vided on its outer end with an integral hub, a solid pin rotatably mounted in said hub, said reduced threaded extension engaging said rotatable pin, a second link pivotally connected at one end to the outer end of said firstrnentioned link free from said cylinder, and means pivotally connecting the other end of said second link on the lower end of said cylinder.

References Cited in the file of this patent UNITED STATES PATENTS 1,709,014 Hamel Apr. 16, 1929 1,849,161 Westwood Mar. 15, 1932 FOREIGN PATENTS 292,273 Great Britain June 21, 1928 

